While heart attack cases are reported throughout the year, the cold weather can heighten the possibility of heart attacks, especially in people with hypertension. "In winter, the blood vessels of the ...

Using a new plethysmographic technique to measure peripheral arterial tone (PAT), we report here that REM sleep in humans is associated with considerable peripheral vasoconstriction. The apparatus ...

Risk score derived from cardiovascular reactivity predictive of adverse outcomes beyond traditional cardiovascular risk factors in CAD.